400.0 mL of a gas are under a pressure of 800.0 mmHG what would the volume of a gas be at a pressure of 1000.0 mmHg

The volume would be 0,318 L ( 318 ml)

Explanation:

We use Boyle Mariotte's formula: for a given mass of gas at constant temperature, the pressure and volume vary inversely proportionally. We convert the unit of pressure to mmHg in atm and the volume in ml into L.

760mmHg 1 atm

800mmHgx= (800mmHgx 1 atm)/760mmHg=1,05 atm

1000mmHg---x= (1000mmHgx 1 atm)/760mmHg=1,32 atm

450/1000= 0,45 L

P1xV1=P2xV2

V2= (P1xV1)/P2= (1,05atmx 0,4L)/1,32 atm=0,318 L

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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your answer would be “dry”